tests: Restore links in deconfigured-cpus nodeinfo test
    
    When cleaning up the data (taken from a running system) for inclusion
    I went a little too far and deleted a bunch of links that should have
    been left alone. The test worked despite this because it was going
    through a fallback code path.
    
    A few other files are affected as well: again, the data is taken from
    a running system, so even thought we would probably be okay if we
    just added the links, aligning everything is definitely safer.